“The great point in the history of Raglan Castle is the defence it made against the parliament in favour of Charles I. By its strength and the spirit of its possessor, Henry Somerset, fifth earl and first marquis of Worcester, the power of Charles was so long maintained in South Wales. It was nearly the last fortress in the kingdom that surrendered to the republican army. The traces of the outworks cast up in front of the castle and citadel, are yet visible in the remains of bastions, hornworks, trenches and ramparts.”

Excerpt from “Raglan Castle”, in ‘Ruined Abbeys and Castles of Great Britain’ by William and Mary Howitt.